xnu-4570.71.2.tar.gz

[apple/xnu.git] / bsd / sys / systm.h

diff --git a/bsd/sys/systm.h b/bsd/sys/systm.h
index 2cbbba27fa15c68bf95baf555479469d76ab938b..98dc4dd529f619835e46739441b8dff108ff271b 100644 (file)
--- a/bsd/sys/systm.h
+++ b/bsd/sys/systm.h
@@ -124,9 +124,12 @@ extern const char copyright[];             /* system copyright */
 extern int     boothowto;      /* reboot flags, from console subsystem */
 extern int     show_space;
 extern int     minimalboot;
+#if CONFIG_EMBEDDED
+extern int     darkboot;
+#endif
 
-extern int nblkdev;            /* number of entries in bdevsw */
-extern int nchrdev;            /* number of entries in cdevsw */
+extern const int nblkdev; /* number of entries in bdevsw */
+extern const int nchrdev; /* number of entries in cdevsw */
 #endif /* BSD_KERNEL_PRIVATE */
 
 #ifdef KERNEL_PRIVATE
@@ -157,15 +160,13 @@ void      realitexpire(struct proc *);
 int    hzto(struct timeval *tv);
 void   tablefull(const char *);
 int    kvprintf(char const *, void (*)(int, void*), void *, int,
-                     __darwin_va_list);
+                     __darwin_va_list) __printflike(1,0);
 void   uprintf(const char *, ...) __printflike(1,2);
 int    copywithin(void *saddr, void *daddr, size_t len);
 int64_t        fulong(user_addr_t addr);
 int    sulong(user_addr_t addr, int64_t longword);
 uint64_t fuulong(user_addr_t addr);
 int    suulong(user_addr_t addr, uint64_t ulongword);
-int    vslock(user_addr_t addr, user_size_t len);
-int    vsunlock(user_addr_t addr, user_size_t len, int dirtied);
 int    clone_system_shared_regions(int shared_regions_active,
                                    int chain_regions,
                                    int base_vnode);
@@ -182,6 +183,7 @@ void        load_init_program(struct proc *p);
 void __pthread_testcancel(int presyscall);
 void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv);
 void update_last_io_time(mount_t mp);
+void throttle_info_end_io(buf_t bp);
 #endif /* BSD_KERNEL_PRIVATE */
 
 #ifdef KERNEL_PRIVATE
@@ -189,6 +191,8 @@ void        timeout(void (*)(void *), void *arg, int ticks);
 void   timeout_with_leeway(void (*)(void *), void *arg, int ticks, int leeway_ticks);
 void   untimeout(void (*)(void *), void *arg);
 int    bsd_hostname(char *, int, int*);
+int    vslock(user_addr_t addr, user_size_t len);
+int    vsunlock(user_addr_t addr, user_size_t len, int dirtied);
 #endif /* KERNEL_PRIVATE */
 
 int    nullop(void);
@@ -217,6 +221,7 @@ void        bsd_timeout(void (*)(void *), void *arg, struct timespec * ts);
 void   bsd_untimeout(void (*)(void *), void *arg);
 void   set_fsblocksize(struct vnode *);
 uint64_t tvtoabstime(struct timeval *);
+uint64_t tstoabstime(struct timespec *);
 void   *throttle_info_create(void);
 void   throttle_info_mount_ref(mount_t mp, void * throttle_info);
 void   throttle_info_mount_rel(mount_t mp);
@@ -224,6 +229,7 @@ void        throttle_info_release(void *throttle_info);
 void   throttle_info_update(void *throttle_info, int flags);
 uint32_t throttle_lowpri_io(int sleep_amount);
 void   throttle_set_thread_io_policy(int policy);
+int            throttle_get_thread_effective_io_policy(void);
 
 typedef struct __throttle_info_handle *throttle_info_handle_t;
 int    throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle);
@@ -237,6 +243,20 @@ void       throttle_info_disable_throttle(int devno, boolean_t isfusion);
  */
 int    throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy);
 
+#ifdef KERNEL_PRIVATE
+
+/* returned by throttle_io_will_be_throttled */
+#define THROTTLE_DISENGAGED    0
+#define THROTTLE_ENGAGED       1
+#define THROTTLE_NOW           2
+
+int  throttle_io_will_be_throttled(int lowpri_window_msecs, mount_t mp);
+int throttle_lowpri_window(void) __attribute__((pure));
+struct uthread;
+void throttle_info_reset_window(struct uthread *ut);
+
+#endif
+
 #ifdef XNU_KERNEL_PRIVATE
 void *exec_spawnattr_getmacpolicyinfo(const void *macextensions, const char *policyname, size_t *lenp);
 #endif